Unknown tag, any way to get more information?


I have an access card I use to enter the building my company is in.
It is a white, credit card sized card with no special markings on it. My name and a 10 digit number (decimal, but could be hex, highest digit is 6) are printed on labels on it.
Looking through the card with a strong flashlight, I can see a chip, and two tiny wires from the chip to one big ring-antenna consisting of many windings of the tiny wire.
Since I saw a few NFC and low frequency cards before, it looks more like a low frequency card to me.

Flipper doesn’t detect the card in 125kHz mode, neither does it in NFC mode.

The reader is not detected by flipper in NFC mode, but if I emulate any 125kHz card and hold the flipper to the reader, the indicator light turns from orange to red, so it is detecting the flipper!

The readers on my normal way into my office don’t have any company name/id/… visible, but there are different readers in different parts of the building I will check.

Is there any way to find out more about the card, e.g. to check if flipper is detecting anything from the card, and just software to support it is missing?

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Untill something like reading raw is implemented there is little you can do.
If you can’t find any markings on the reader the best that you can do with flipper is what you already have done.
If the reader reacted to flipper in 125khz mode it most likely is a low frequency reader but it can be both, so you can use something like this to make sure

You can try to read your card with other stuff like KeySy, proxmark3, ICopy, etc

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Hi! RFID RAW has been implemented, you can now enable debug in your flipper’s system settings and record the signal from the tag via the Record RAW option in LFRFID’s Extra actions menu, and then send it here for us to analyze.